BIOS ROM package for an FM2A55M-HD+ desktop motherboard, with the name pointing to firmware version 2.80. The board name follows ASRock's numbering style, but no brand is given, so confirm the model on the PCB silkscreen. Inside the RAR archive is a ROM image meant for recovering a board with corrupted firmware, normally by writing it to the SPI flash chip with a programmer such as a CH341A. Read and save the original chip contents first, and make sure the image size matches the chip capacity before you program it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →